Reaction Rates and Energy diagrams

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

Tags

NGSS.HS-PS1-5

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

Increasing the temperature gives particles more __________.

• Time

• Energy

• Space

• Frequency

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

As the frequency of ______________ increases, the rate of reaction increases.

• Time

• Reactions

• Collisions

• Reactants

Tags

NGSS.HS-PS1-5

Adding a catalyst ___________ the activation energy.

• Raises

• Lowers

• Doesn't affect

The minimum amount of energy needed for colliding particles to react is called

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

Substance that changes the rate of a chemical reaction without being consumed in the reaction

• bonding

• catalyst

• chemical reaction

• activation energy

Tags

NGSS.HS-PS1-5

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

In an exothermic reaction, the heat/energy is on the __ side of the chemical equation.

• reactant

• product